$\frac{3^8}{3^6}$
$x-50-16x$
$9^x+4\cdot3^{x+1}-45=0$
$4\sin x-3=0$
$\frac{2x^3}{9+4x^2}$
$y'+by=d$
$\left(w-4\right)\left(-y-9w\right)$
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